Scubapro Aladin A2 User Manual
Aladin A2
User Manual
®
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A2 USER MANUAL
ALADIN A2 USER MANUAL
THE A2 DIVE COMPUTER – DESIGNED FOR EVERYDAY LIFE AND DIVING.
Welcome to SCUBAPRO dive computers and thank you for purchasing the A2. You are now
the owner of an extraordinary partner for your dives and everyday life. This manual provides
you with easy access to SCUBAPRO state-of-the-art technology and the A2’s key features
and functions. Should you wish to know more about SCUBAPRO diving equipment, please
visit our website www.scubapro.com
IMPORTANT
Before using your SCUBAPRO A2, please carefully read and understand the Read First booklet that
is included in the package.
English
• The A2 has a depth rating of 120m/394ft.
• At depths between 115m/377ft and 120m/394ft in Dive mode the A2 provides alerts about the
maximum depth, and at depths over 120m/394ft the A2 automatically switches to Gauge mode and
cannot be used as a decompression computer for the remaining time of the dive.
• Diving at oxygen partial pressures higher than 1.6bar (corresponding to a depth of 67m/220ft when
breathing compressed air) is extremely dangerous and could lead to serious injury or death.
• Never risk your life on only one source of information. Eventually, every computer has the potential
to fail, so do not depend exclusively upon it and always have a plan for how to handle failures. Use
a redundant dive computer, carry backup tables and depth/time instrumentation.
The A2 is delivered in deep sleep mode where the display is off. You must activate the A2 with a
press-and-hold of the SEL/ESC button before the rst dive.
The A2 dive instrument is also compliant with the European Union directive 2014/30/EU.
Standard EN 13319: 2000
The A2 dive instrument is compliant with the European standard EN 13319: 2000 (EN 13319: 2000 – Depth gauges and
combined depth and time measuring devices – Functional and safety requirements, tests methods).
A2 USER MANUAL
WARNING
WARNING
The A2 dive instrument is a personal protective equipment in compliance with the essential safety requirements
of the European Union Regulation 2016/425. RINA SpA, Via Corsica 12, I-16128 Genoa, notified body no.
0474, have certified its conformity with the European Standard EN 250: 2014 (EN 250: 2014 : Respiratory
equipment – Open circuit self-contained compressed air diving apparatus – requirements, testing and marking);
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TABLE OF CONTENTS
1. INTRODUCTION TO THE A2 ................................................................................... 8
1.1 Switching on the A2 ......................................................................................... 8
1.2 The watch screen ............................................................................................. 8
1.3 A2 buttons ....................................................................................................... 9
1.4 Button lock ....................................................................................................... 9
1.5 Bezel markings and symbols .......................................................................... 10
1.6 Battery ........................................................................................................... 11
1.7 Operation modes ........................................................................................... 11
1.8 Basic settings ................................................................................................. 13
1.8.1 Time and date settings ...................................................................... 13
1.8.2 User settings ..................................................................................... 14
2. A2 AS AN EVERYDAY WATCH .............................................................................. 14
2.1 Clock setting functions ................................................................................... 14
2.1.1 Setting the alarm clock ...................................................................... 15
2.1.2 Setting UTC 1 .................................................................................... 15
2.1.3 Setting UTC 2 .................................................................................... 15
2.1.4 Setting the time ................................................................................. 15
2.1.5 Setting the date ................................................................................. 16
2.1.6 Display design ................................................................................... 16
2.1.7 Time format ....................................................................................... 17
2.2 Sport mode .................................................................................................... 17
2.2.1 Stopwatch ......................................................................................... 18
2.2.2 Training mode .................................................................................... 19
2.2.3 Swim mode ....................................................................................... 20
2.2.4 Apnea mode ...................................................................................... 20
2.2.5 Enabling the activity counter .............................................................. 21
2.3 Navigation ...................................................................................................... 21
2.3.1 Using, calibrating and setting the compass ........................................ 21
2.3.1.1 Bearing ..................................................................................22
2.3.1.2 Declination ............................................................................22
2.3.1.3 Timeout .................................................................................22
2.3.1.4 Recalibration .........................................................................23
2.3.2 Reading the altitude, barometric and temperature values ................... 24
3. A2 SETTINGS AND MENUS ON THE SURFACE ................................................. 25
3.1 General settings ............................................................................................. 25
3.1.1 User settings ..................................................................................... 26
3.1.1.1 Workload ...............................................................................26
3.1.1.2 Backlight ...............................................................................27
3.1.1.3 Contrast ................................................................................27
3.1.1.4 Units ......................................................................................27
3.1.1.5 Owner information .................................................................28
3.1.1.6 Desaturation reset .................................................................28
3.1.1.7 Service Information ................................................................28
3.1.2 Swim settings .................................................................................... 29
3.1.2.1 Swim heart rate .....................................................................29
3.1.2.2 Swim stroke depth and length ..............................................29
3.1.3 Sound settings .................................................................................. 31
3.1.3.1 Buzzer ...................................................................................31
3.1.3.2 Button beeps ........................................................................31
3.1.3.3 Dive warnings ........................................................................31
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3.1.4 Checking the battery status ............................................................... 32
3.2 Dive settings on surface ................................................................................. 32
3.2.1 Dive mode selection .......................................................................... 32
3.2.2 Scuba mode settings ......................................................................... 33
3.2.2.1 Water type selection ..............................................................33
3.2.2.2 Microbubble level selection ....................................................33
3.2.2.3 Dive display type ...................................................................34
3.2.2.4 Enabling CCR mode ..............................................................34
3.2.2.5 Enabling Sidemount mode ....................................................34
3.2.2.6 Enabling PMG mode .............................................................35
3.2.2.7 Enabling Trimix mode ............................................................35
3.2.3 Apnea mode settings ......................................................................... 35
3.2.3.1 Total Apnea exercise depth ....................................................36
3.2.3.2 Surface interval factor ............................................................36
3.2.3.3 Dual depth alarm ...................................................................37
3.2.3.4 Dive depth incremental alarm.................................................37
3.2.3.5 Dive time interval alarm ..........................................................38
3.2.3.6 Surface interval alarm ............................................................38
3.2.3.7 Low heart rate alarm ..............................................................39
3.2.3.8 Ascent speed alarm ...............................................................39
3.2.4 Warning settings ................................................................................ 39
3.2.4.1 Setting the dive time warning .................................................40
3.2.4.2 Setting the dive depth warning ..............................................40
3.2.4.3 Setting the MOD alarm ..........................................................40
3.2.4.4 Setting the visual warning signal ............................................40
3.3 Gas settings ................................................................................................... 41
3.3.1 Setting gas oxygen content ............................................................... 41
3.3.1.1 Predictive multi gas (PMG) .....................................................42
3.3.1.2 Trimix .....................................................................................42
3.3.1.3 CCR ......................................................................................43
3.3.2 Mounting and pairing the high pressure transmitter ............................ 44
3.3.3 Nitrox reset time ................................................................................ 46
3.3.4 Full gas .............................................................................................. 46
3.3.5 Setting the half tank warning ............................................................. 47
3.3.6 Setting the tank reserve alarm ........................................................... 47
3.4 Planning a dive ............................................................................................... 47
3.4.1 No-stop plan ..................................................................................... 47
3.4.2 Decompression plan .......................................................................... 48
3.5 Reading the logbook ...................................................................................... 48
3.5.1 Dive statistics .................................................................................... 49
3.5.2 Step counter statistics ....................................................................... 50
4. DIVING WITH THE A2 ............................................................................................ 50
4.1 Display information ......................................................................................... 51
4.1.1 Dive ready mode ............................................................................... 51
4.1.2 Display conguration during the dive .................................................. 52
4.1.2.1 SCUBA mode display selection .............................................52
4.1.2.1.1 Light version ........................................................52
4.1.2.1.2 Classic version .....................................................53
4.1.2.2 GAUGE mode display selection .............................................53
4.1.2.2.1 Light version ........................................................54
4.1.2.2.2 Classic version .....................................................54
4.1.2.3 APNEA mode ........................................................................55
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A2 USER MANUAL
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4.2 Safety stop timer ............................................................................................ 56
4.3 Activating the backlight .................................................................................. 56
4.4 Alarms and warnings during diving ................................................................. 56
4.4.1 Maximum depth warning ................................................................... 56
4.4.2 MOD (ppO2max) alarm ....................................................................... 57
4.4.3 AMD (ppO2min) alarm ........................................................................ 57
4.4.4 Dive time warning .............................................................................. 57
4.4.5 Turning time ....................................................................................... 57
4.4.6 No-stop time = 2 minute warning ...................................................... 57
4.4.7 No-stop time warning ........................................................................ 58
4.4.8 CNS O2 warning (over 75%) .............................................................. 58
4.4.9 CNS O2 alarm (100%) ........................................................................ 58
4.4.10 L0 no-stop time = 2 minute warning .................................................. 58
4.4.11 Entering decompression warning ....................................................... 58
4.4.12 Missed decompression stop alarm .................................................... 59
4.4.13 MB-level stop ignored ........................................................................ 59
4.4.14 MB-level reduction warning ............................................................... 59
4.4.15 Ascent rate alarm .............................................................................. 59
4.4.16 SOS .................................................................................................. 60
4.4.17 Low battery alarm .............................................................................. 60
4.4.18 Pressure signal .................................................................................. 60
4.4.19 RBT = 0 min ...................................................................................... 61
4.4.20 Half tank warning ............................................................................... 61
4.4.21 Tank reserve alarm ............................................................................. 61
4.5 No-Dive warning ............................................................................................ 61
4.6 No-Fly time ..................................................................................................... 62
4.7 Diving with MB-levels ..................................................................................... 62
4.8 PDIS (Prole Dependent Intermediate Stop) .................................................... 63
4.8.1 Introduction to PDIS .......................................................................... 63
4.8.2 How does PDIS work? ...................................................................... 64
4.8.3 Diving with PDIS ................................................................................ 65
4.9 Altitude diving ................................................................................................. 65
4.9.1 Altitude warning after a dive ............................................................... 65
4.9.2 Altitude and the decompression algorithm ......................................... 66
4.9.3 Prohibited altitude .............................................................................. 67
4.9.4 Decompression dives in mountain lakes ............................................ 67
4.10 Diving with Nitrox ........................................................................................... 67
4.11 Diving in GAUGE mode .................................................................................. 68
4.12 Diving in APNEA mode ................................................................................... 69
4.13 Diving with CCR mode ................................................................................... 70
4.14 Diving with Sidemount mode .......................................................................... 71
4.15 Diving with multiple gas mixtures .................................................................... 72
4.15.1 Switching gas mixture during the dive ................................................ 73
4.15.2 Switching back to a gas mixture with lower oxygen concentration ..... 73
4.15.3 Gas switch not carried out at the planned depth ................................ 73
4.15.4 Delayed gas switch ............................................................................ 74
4.15.5 Submerging below the MOD after a gas switch ................................. 74
4.16 Diving with Trimix mode .................................................................................. 74
4.16.1 Absolute Minimum Depth and Maximum Operating Depth ................. 75
4.16.2 Gas selection ..................................................................................... 75
4.17 Setting bookmarks ......................................................................................... 75
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5. INTERFACES FOR THE A2 AND AN INTRODUCTION TO LOGTRAK ............... 76
5.1 Establishing Bluetooth communication ........................................................... 76
5.2 LogTRAK ....................................................................................................... 76
5.2.1 Connecting the A2 with LogTRAK ..................................................... 76
5.2.2 Download dive proles ....................................................................... 77
5.2.3 Reading computer information ........................................................... 77
5.2.4 Writing owner information with LogTRAK ........................................... 78
5.2.5 Setting units in LogTRAK ................................................................... 78
5.2.6 Updating your A2 .............................................................................. 78
6. A2 ACCESSORIES ................................................................................................. 80
6.1 Wireless high pressure transmitter .................................................................. 80
6.2 Skin temperature heart rate belt ..................................................................... 80
7. TAKING CARE OF YOUR A2 ................................................................................. 81
7.1 Changing the watch strap .............................................................................. 81
7.2 Display protection foil ..................................................................................... 81
7.3 Technical information ...................................................................................... 82
7.4 Maintenance .................................................................................................. 82
7.5 Replacing the battery in the high pressure transmitter .................................... 83
7.6 Replacing the battery in Heart Rate Belt ......................................................... 83
7.7 Warranty ........................................................................................................ 84
7.8 Compliance .................................................................................................... 84
7.8.1 EU Radio directive ............................................................................. 84
7.8.2 Diving ................................................................................................ 84
7.8.3 FCC & ISED regulatory notices .......................................................... 84
7.8.3.1 Modication Statement ..........................................................84
7.8.3.2 Interference Statement ..........................................................84
7.8.3.3 Wireless Notice ......................................................................84
7.8.3.4 FCC Class B Digital Device Notice .........................................85
7.8.3.5 CAN ICES-3 (B) / NMB-3 (B) .................................................85
7.9 Manufacturer .................................................................................................. 85
8. GLOSSARY ............................................................................................................. 86
9. INDEX ..................................................................................................................... 88
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A2 USER MANUAL
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1. INTRODUCTION TO
THE A2
Your A2 user manual is divided into the
following main chapters:
Introduction to the A2. This chapter
provides an overview of the A2 dive computer
and describes its operating modes and main
functions when on the surface.
A2 as an everyday watch. This chapter
describes the A2’s operation when it is
used as a watch.
A2 settings and menus on the surface. This
section goes through the settings of your A2.
Diving with the A2. This section takes you
underwater with the A2 and describes all
settings and functions of the A2 as a dive
computer. It outlines everything the A2
can—and will—do to enhance your safety
and fun underwater.
Interfaces for the A2 and an
introduction to LogTRAK. This section
describes how to download data, change
settings, and manage your logbook.
A2 accessories. This chapter briey
describes the extras that can be purchased
as additional options to get the most of
your dive computer in all diving conditions.
Taking care of your A2. This chapter
describes how you should take care of your
A2 after underwater adventures, and also
summarizes the main technical information
of this instrument.
The A2 is a technologically-advanced
instrument that can accompany you
during your underwater adventures while
providing you with accurate depth, time
and decompression information. On
the surface its size makes it your ideal
everyday companion. With features such
as wake-up alarm, dual time, stopwatch,
barometer, altimeter and swim mode, the
A2 can tackle almost every possible task.
The buttons allow you to initiate operating
functions, make setting changes and
access menus while on the surface. During
the dive they show additional information
on the computer screen and activate the
backlight.
Now it is time to dive into the details. We
hope you will enjoy getting to know your
new computer and we wish you many
happy dives with the A2.
1.1 Switching on the A2
The A2 is delivered to you in a deep sleep
mode. This is done to preserve battery life
and to ensure your A2 arrives with a fresh
battery.
In order to switch on the A2 for the rst
time you need to press-and-hold the SEL/
ESC button (lower left). After this initial
activation, the A2 will never again return to
deep sleep mode.
1.2 The watch screen
When the A2 is switched on the rst time
the display screen shows the time and date
as follows:
The time and date values, along with the
format, can be changed to your liking. This
is described in chapters 2.1.6 Display
design and 2.1.7 Time format.
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A2 USER MANUAL
1.3 A2 buttons
The functions of the buttons on the
surface are summarized in the table below
and explained in detail in the following
sections.
“LIGHT”
button,
Top Left:
“SEL/ESC”
button,
Bottom
Left:
“+/UP”
button,
Top Right:
“-/DOWN”
button,
Bottom
Right:
Press = backlight
Press-and-hold = launch
compass
Press = select (access main
menu and submenus or
conrm selection / setting)
Press-and-hold = escape
(return to previous menu or
cancel the setting); from the
main time and date display
shows the current gas
settings
Press = adds numerical
values, toggles up to the
previous menu
Press-and-hold = from the
main time and date display
shows the selected dive
mode; from the selected dive
mode display activates the
swim mode
Press = subtracts numerical
values, toggles down to the
next menu
Press-and-hold = from the
main time and date display:
shortcut to dive ready mode
which shows the main dive
settings
1.4 Button lock
A simultaneous press-and-hold of the SEL/
ESC and -/DOWN buttons will lock the
main time and date display. Once locked,
by pressing just the SEL/ESC button the
following screen will be displayed:
Unlock the display by simultaneously
pressing-and-holding the SEL/ESC and -/
DOWN buttons again.
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A2 USER MANUAL
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1.5 Bezel markings and symbols
In this section the markings and symbols on the A2’s outer and inner bezel as well as on its
display are explained in detail.
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1 No-y symbol
2 Planner menu indicator
3 +/UP button
4 Logbook menu indicator
5 Water contact
6 Active tank pressure indicator bar
7 Dive menu indicator
8 -/DOWN button
9 Settings menu indicator
10 Low battery symbol
11 Altitude symbol
12 Heart rate detection symbol
13 Gas menu indicator
14 SEL/ESC button
15 Sport menu indicator
16 Ascent speed / N2 bar
17 Bluetooth menu indicator
18 Light button
19 Navigation menu indicator
20 No-dive symbol
A2 USER MANUAL
1.6 Battery
The A2 uses a CR2450 battery type.
The A2 will alert you when the battery is
approaching a critical discharge level by
displaying the battery symbol.
A steady symbol means that the battery is
low, with some reserve left. At this point the
backlight cannot be activated. If the symbol
blinks, the battery level is dangerously low
and the backlight and alarm tones cannot
be activated; diving is not recommended
before replacing the battery.
WARNING
Starting a dive when the battery symbol is
blinking can cause the computer to fail during
the dive! Replace the battery before any diving
activity if the blinking battery symbol appears.
When the “no-dive” symbol appears with the
battery symbol, the A2 cannot be used for
diving until a fresh battery is installed.
Please refer to chapter 3.1.4 Checking
the battery status for details on how to
manually trigger the battery level check.
WARNING
The A2 will not start a dive if the battery has
reached the critical level indicated by the
battery symbol. In this state the A2 cannot be
used for diving.
WARNING
When your A2’s battery reaches the end of its
lifetime, it is recommended that it be replaced
by an authorized SCUBAPRO service center.
1.7 Operation modes
The A2’s different modes are shown on the
dial ring of the computer and the current
function mode is indicated with an arrow.
Each mode may have sub functions and
menus. By pressing the SEL/ESC button
you activate the mode and as an indication
the arrow starts blinking.
The modes are grouped and described in
this manual in four chapters:
1. A2 as an everyday watch.
2. A2 settings and menus.
3. A2 as a dive computer.
4. Bluetooth interface of the A2 and an
introduction to LogTRAK.
The A2 has two main operation modes:
1. Watch mode. The display is on and
shows the time and date (in various
formats). From this mode other surface
operation modes can be selected:
a. Sport mode
b. Bluetooth communication mode
c. Compass
d. Altimeter
e. Dive planner
f. Logbook
As well as settings can be changed:
a. Dive settings
b. User settings
c. Gas settings
2. Dive mode. This mode is activated
when the computer reaches a depth of
0.8m/3ft or more. In this mode the A2
monitors depth, time, temperature and
decompression.
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A2 USER MANUAL
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The following chart describes the main menu structure:
TIME
& DATE
DIVE
LOGBOOK
PLANNER
NAVIGATION
BLUETOOTH
SPORT
GAS
RETURN
SETTINGS
Logbook
pages
DOWN
DOWN
DOWN
UP
UP
UP
UP
DOWN
DOWN
DOWN
DOWN
DOWN
UP
UP
UP
UP
SEL
Planner
pages
Compass
settings
Bluetooth
connection
Sport settings
Dive settings
& menus
User settings
Gas settings
SEL
SEL
SEL
SEL
SEL
SEL
SEL
ESC
ESC
ESC
ESC
ESC
ESC
ESC
ESC
SEL
ESC
ESC
DOWN
UP
TIME & DATE
Dive settings
& menus
User settings
Gas settings
Sport settings
Bluetooth
connection
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Compass
settings
Planner
pages
Logbook
pages
A2 USER MANUAL
1.8 Basic settings
The initial activation of your A2 requires
some basic set-up (setting time and date,
units, etc.).
1.8.1 Time and date settings
Starting from the
main time and date
display, pressing the
SEL/ESC button
takes you to the
main menu.
English
After the minutes
are conrmed
the date can be
adjusted the same
way.
From the main
menu toggle down
to Settings with
the -/DOWN button
then press SEL/
ESC.
From the Settings
menu toggle down
to Watch then
press SEL/ESC.
From the Watch
menu toggle down
to Set Time then
press SEL/ESC.
By pressing +/UP
or -/DOWN you can
select the hours
and conrm them
by pressing SEL/
ESC. The minutes
can be set the
same way.
There are additional watch settings that
you can adjust to your liking. These are
described in chapter 2.1 Clock setting
functions.
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1.8.2 User settings
WATCH
ALARM
SET UTC 1
SET UTC
2
SET TIME
SET DATE
DESIGN
FORMAT
RETURN
DOWN
UP
DOWN
UP
UP
UP
UP
UP
UP
DOWN
DOWN
DOWN
DOWN
DOWN
SEL
ESC
ESC
DOWN
UP
The user-related settings (backlight
duration, display contrast, units, etc.) can
be selected with a press-and-hold of the
SEL/ESC button which returns you to the
previous submenu.
For example, from
the Settings menu
toggle down to
User then press
SEL/ESC.
From the User
menu toggle down
to Units then press
SEL/ESC.
Now the various
units can be
selected. These
selections are
effective in all
operating modes;
for example, during
diving your depth
can be shown in
meters or in feet.
2. A2 AS AN EVERYDAY
WATCH
The A2 is more than just a watch. It features:
• Stopwatch with lap time and 72 hours
of run time.
• Swim stroke and distance counter.
• Navigation compass.
• Altimeter for tracking your excursions to
the mountains.
• Thermometer and barometer for current
weather conditions.
• Heart rate monitor function.
• Wireless air integration.
• Step counter / activity tracker.
• Wake-up alarm function.
• Dual time.
2.1 Clock setting functions
Starting from the main time and date
display, press the SEL/ESC button to enter
the main menu.
From the main menu, toggle down to
Settings with the -/DOWN button, then
press SEL/ESC. From the Settings menu
select Watch to enter the clock settings.
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A2 USER MANUAL
2.1.1 Setting the alarm clock
From the Watch menu press the SEL/
ESC button to enter the Alarm submenu.
Here you can activate or deactivate the
alarm clock by pressing the +/UP or -/
DOWN buttons. Selecting ALARM ON
will allow you to set the time of the alarm.
You can scroll the hours by pressing +/UP
or -/DOWN buttons. Pressing SEL/ESC
will conrm the hour setting and switch
to minutes. You can scroll the minutes
by pressing +/UP or -/DOWN buttons.
Pressing the SEL/ESC button will conrm
the minutes setting and activate the alarm.
2.1.3 Setting UTC 2
Dual time uses the same “base time” as
the main clock. Therefore, adjusting the
time as described in section ‘Setting the
time’ will also inuence the dual time. The
dual time zone selection will dene the
difference to the main clock time. When the
time zone selection is OFF, then the dual
time is disabled. When pressing the SEL/
ESC button the UTC 2 time hours will be
highlighted. You may change the setting
by pressing the +/UP or -/DOWN buttons
in a range of +14h to -13h or by selecting
OFF. By pressing the SEL/ESC button,
the minutes will be highlighted and you
may edit them using the +/UP or -/DOWN
buttons in 15-minute increments. The UTC
2 setting will be conrmed by pressing the
SEL/ESC button.
English
2.1.2 Setting UTC 1
The UTC setting will change the displayed
time compared to Greenwich 0-Meridian.
This feature is practical when traveling
through different time zones. By pressing
SEL/ESC you may edit the hours with +/
UP or -/DOWN buttons in a range of +14h
to -13h. By pressing SEL/ESC the minutes
will be highlighted and you may edit them
with +/UP or -/DOWN buttons in 15-minute
increments. The UTC 1 setting will be
conrmed by pressing the SEL/ESC button.
A2 USER MANUAL
2.1.4 Setting the time
By pressing the SEL/ESC button in the
Set Time submenu the time setting will be
activated. You may change the hours with
+/UP or -/DOWN buttons. By pressing the
SEL/ESC button the selection will change
to minutes and can be edited. The new
time setting will be conrmed by pressing
the SEL/ESC button.
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NOTE: seconds cannot be edited;
F
they always start counting from 0.
2.1.5 Setting the date
By pressing the SEL/ESC button in the
Set Date submenu the rst two digits will
be highlighted. You may change them by
pressing the +/ UP or -/DOWN buttons.
Change the selection to the next two digits
by pressing the SEL/ESC button. Finally,
set the year by pressing +/ UP or -/DOWN
and conrm the date with the SEL/ESC
button. In 24h time format the rst digits in
the date are days, in AM/PM time format
the month is rst. You can toggle between
24h and AM/PM in the Format submenu.
2.1.6 Display design
In this menu you may select the design of
the main time and date display to suit your
personal preferences by scrolling through
the options with the +/ UP or -/DOWN
buttons. Conrm your selection by pressing
the SEL/ESC button. In the following
screens the display design selection is
shown next to how the layout is presented
on the main watch display screen.
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A2 USER MANUAL
2.1.7 Time format
SPORT
S-WATCH
TRAINING
SWIM
APNEA
SEL
ESC
ESC
DOWN
UP
DOWN
DOWN
UP
UP
DOWN
UP
STEPCOUNTER
UP
DOWN
RETURN
UP
DOWN
Choose your preferred time format by
scrolling with the +/ UP or -/DOWN
buttons, press the SEL/ESC button to save
your settings. You can choose between
AM/PM or 24-hour format.
NOTE: Time format will also change
F
the date format: MM/DD/YY in AM/
PM mode and DD/MM/YY in 24h
mode. This change will take place, for
example, in watch mode, logbook, etc.
2.2 Sport mode
Starting from the main time and date
display, press the SEL/ESC button to enter
the main menu, then toggle down to Sport
and press the SEL/ESC button again to
enter the Sport menu. In this menu sportrelated functions like swim stroke counter,
stopwatch or activity counter (training) can
be activated.
English
A2 USER MANUAL
The functions of the buttons in Sport
mode are summarized in the table below
and explained in detail in the following
sections.
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“LIGHT”
“SEL/ESC”
“+/UP”
“-/DOWN”
Press = backlight
Press-and-hold in Swim
mode = launch the compass
Press-and-hold in
Stopwatch mode = returns
to the main time and
date display (stopwatch
will still be running in the
background)
Press in Swim mode =
stops/restarts timer
Press-and-hold in Swim
mode = ends swim exercise
Press in Stopwatch mode =
returns to Sport menu
Press-and-hold in
Stopwatch mode = returns
to Sport menu
Press in Training mode = set
bookmark
Press = scrolls through the
alternative displays
Press-and-hold in Swim
mode = ends swim exercise
Press in Stopwatch mode =
manually start/stop timer
Press-and-hold in Stopwatch
mode when timer stopped =
reset timer to zero
Press-and-hold in Training
mode = stops/restarts timer
Press = scrolls through the
alternative displays
Press in Stopwatch mode
when timer stopped = scrolls
through laps
2.2.1 Stopwatch
From the Sport menu press SEL/ESC to
enter the Stopwatch submenu.
The stopwatch will start measuring the time
by pressing the +/UP button.
To pause the time on the stopwatch press
the +/UP button once again. To reset the
time to 0 press-and-hold the +/UP button
while the stopwatch display shows the
status STOPPED.
In addition to time, laps can be marked
by pressing the -/DOWN button while the
stopwatch is running. By doing so the lower
part of the screen will show the number of
the lap while the lap time will be displayed
in the upper part of the screen. While the
stopwatch is stopped you can review your
lap times from the memory by repeatedly
pressing the -/DOWN button.
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A2 USER MANUAL
By pressing-and-holding the SEL/ESC
button you can exit the stopwatch and
return to the Sport menu.
NOTE: You can leave the stopwatch
F
actively counting or you can leave
the stopped time on the display.
The status will be stored in memory,
allowing you to continue from the
same display at a future time.
Air pressure in
millibars.
English
2.2.2 Training mode
From the main menu toggle down to Sport
and press SEL/ESC to enter.
Pressing the SEL/ESC button in the
Training submenu will start the exercise. A
press-and-hold of the same button will end
the exercise.
In the middle row the time is counting. The
counter can be stopped and restarted by
a press-and-hold of the +/UP button. The
current time is displayed on top, stop timer
in the middle, temperature in the bottom
left and the heart rate in the bottom right
of the screen.
Total ascent during
the exercise
Altitude difference
during the exercise
Current altitude.
Minutes per 1000
repetitions.
The information in the middle row can be
scrolled through by pressing the +/UP or -/
DOWN buttons. A press of the +/UP button
will change the top row information in the
following order:
A2 USER MANUAL
Repetitions per
minute.
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Step (repetition)
count during
current exercise.
NOTE: Since the A2 is worn on
F
the wrist, it is counting repetitive
movements from its internal sensors
in Sport mode. The A2 is not a pure
step counter since arm movements
may count as repetitions as well. The
A2 is also not an activity band since
only same-direction movements are
counted.
NOTE: Refer to chapter 3.5.2 Step
F
counter statistics to learn how
to review your weekly or monthly
statistics from the logbook.
2.2.3 Swim mode
Swim mode combines a stopwatch with
a stroke and distance counter. For proper
counter operation the user’s pending values
can be adjusted. These are described in
chapter 3.1.2 Swim settings.
in the bottom left of the display. When the
heart rate function is activated, the values
will be displayed in the bottom right corner
of the screen. Switch between displays by
pressing the +/UP or -/DOWN buttons. A
press of the SEL/ESC returns you to the
Sport menu.
NOTE: Swim mode stays active in
F
shallow water down to 3 meters. This
allows ip turns in pool and horizontal
dives. An immersion deeper than 3
meters will start a dive in the mode
which is selected in the A2 (SCUBA,
APNEA or GAUGE).
2.2.4 Apnea mode
Apnea exercise mode can be activated
from the Apnea menu. The session starts
with a surface interval.
Apnea mode settings are described in
chapter 3.2.3 Apnea mode settings.
Display information and diving with this
mode is described in chapter 4.1.2.3
APNEA mode.
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When the swim mode is activated, the
duration of your swim will be shown on
the second screen. The distance will be
displayed on the third screen and the
last screen will show the number of swim
strokes. The water temperature is shown
A2 USER MANUAL
2.2.5 Enabling the activity counter
NAVIGATION
COMPASS
RETURN
ALTIMETER
DOWN
UP
SEL
ESC
ESC
UP
UP
DOWN
DOWN
COMPASS
BEARING
DECLINATION
TIMEOUT
CALIBRATION
SEL
ESC
UP
DOWN
UP
UP
UP
DOWN
DOWN
DOWN
ESC
RETURN
UP
DOWN
The A2 has a step counter that can be
switched on in order to count your daily
activity. This functionality is running in the
background of the A2’s normal watch
operation. During diving the activity counter
is deactivated.
2.3 Navigation
From the main menu toggle down to the
Navi submenu and enter by pressing the
SEL/ESC button. In this section compass
related settings as well as information about
the altitude, barometric and temperature
values can be selected.
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A2 USER MANUAL
If the A2’s step counter is enabled in the
background (ON), you can set the LCD
display to switch off when there is no
motion detected. The time after the display
would switch off can be set from 1 to
240 minutes or you can set the display to
stay active even when there is no motion
detected by selecting “never” in this menu.
NOTE: If you do not wish to track
F
your daily activity with the A2, you
can disable the activity counter by
selecting OFF in this menu. This
will also help preserve the battery’s
lifetime.
NOTE: Refer to chapter 3.5.2 Step
F
counter statistics to learn how to
review your daily, weekly or monthly
statistics from the logbook.
2.3.1 Using, calibrating and setting
the compass
In this section compass related settings are
described in detail. The different settings
can be selected in the following submenus:
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2.3.1.1 Bearing
By pressing the SEL/ESC button the
compass will be launched and show the
bearing direction (12 o’clock on the watch)
in the middle row in degrees.
2.3.1.2 Declination
A compass points to the magnetic north
pole of the earth. Geographic and magnetic
north poles are corrected with a declination
setting. Declination depends on your
current location on the earth.
By pressing the SEL/ESC button the
declination value will be highlighted. By
pressing the +/UP or -/DOWN buttons
you can select the value from -90 to 90°
in 1° increments. By pressing SEL/ESC the
value will be conrmed.
2.3.1.3 Timeout
Compass timeout is the amount of time
the compass is displayed when activated.
Compass timeout is valid for the display
of the compass in all modes: Dive, Sport,
etc. You can adjust the timeout setting by
pressing SEL/ESC and scrolling the values
by pressing the +/UP or -/DOWN buttons
between 5, 10, 15, 30 and 60 seconds or
PUSH (on/off). By pressing the SEL/ESC
button the value will be conrmed.
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A2 USER MANUAL
2.3.1.4 Recalibration
1. PLACE
HORIZONTALLY
2. ROTATE
HORIZONTALLY
3. PLACE
VERTICALLY
4. ROTATE
VERTICALLY
5. READY
CALIBRATION
SEL
SEL
SEL
SEL
SEL
SEL
NOTE: The compass must be
F
recalibrated after each battery change
or when traveling to a location where
the earth’s magnetic eld strength is
different.
English
A2 USER MANUAL
By pressing the SEL/ESC button the
recalibration process will start.
1. Place horizontally. Hold the A2 so
that its display points upwards. Press
the SEL/ESC button.
2. Rotate horizontally. Rotate the A2 at
least 180° horizontally. Press the SEL/
ESC button.
3. Place vertically. Hold the A2 so that
its display points sideways. Press the
SEL/ESC button.
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4. Rotate vertically. Rotate the A2 at
least 180° vertically. Press the SEL/
ESC button.
5. Calibration ready. The A2’s
3D compass recalibration is now
complete.
2.3.2 Reading the altitude,
barometric and temperature
values
In the Navigation (Navi) menu toggle
down to Altimeter (Altimtr) and press the
SEL/ESC button to enter. In this submenu
on the rst display the current altitude
(in meter or feet) is calculated from the
barometric pressure and shown in the
middle of the screen. The temperature (in
Celcius or Fahrenheit) and air pressure (in
mbar) at your current altitude are displayed
in the bottom left and bottom right of the
screen, respectively.
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NOTE: Barometric pressure is a
F
variable, changing with weather and
atmospheric pressure at a particular
elevation. The Dive algorithm uses
Altitude Classes which are directly
derived from the barometric pressure.
Altitude is counted from the current
barometric pressure and is therefore a
relative value.
A2 USER MANUAL
By pressing the +/UP or -/DOWN buttons
WATCH
USER
SWIM
SOUND
BATTERY
RETURN
SETTINGS
DOWN
UP
SEL
ESC
ESC
UP
UP
UP
UP
UP
DOWN
DOWN
DOWN
DOWN
DOWN
you can switch to an additional display
where the atmospheric pressure at sea
level is shown.
The altitude can be adjusted when current
elevation is known by pressing the SEL/
ESC button. The new altitude value will
be highlighted in the center of the screen.
By pressing +/UP or -/DOWN buttons
the value can be adjusted in 10m/50ft
increments.
This Barometer feature allows you to
foresee approaching weather in the
upcoming hours if your altitude remains the
same.
3. A2 SETTINGS AND
MENUS ON THE
SURFACE
In this chapter the settings that can be
completed on the surface are described.
These settings will allow you to personalize
your A2 as desired.
3.1 General settings
In the Settings menu the following
functions can be set:
• Watch settings – please refer to chapter
2.1 Clock setting functions.
• User settings – workload, backlight,
display contrast, units, owner info,
desaturation reset, service check,
current software version.
• Swim settings – swim heart rate, swim
stroke depth and length.
• Sound settings – enable or disable
button beeps, dive warnings.
• Battery – check battery status.
English
A2 USER MANUAL
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3.1.1 User settings
USER
LIGHT
CONTRAST
UNITS
OWNER
DESATURATION
RETURN
DOWN
UP
UP
UP
UP
UP
UP
SEL
ESC
DOWN
DOWN
DOWN
DOWN
DOWN
ESC
WORKLOAD
UP
DOWN
UP
DOWN
SERVICE
This section allows you to customize your
A2 to your liking. Settings like backlight
duration, display contrast and units can be
changed here.
ADT model is changed accordingly. This
menu allows you to select the workload
base or switch off the workload estimation,
in which case your A2 will behave like the
SCUBAPRO dive computer models without
heart rate or air integration.
In the workload menu you can scroll the
parameters which are used to measure
your workload during the dive by pressing
the +/UP or -/DOWN buttons. If you select
the heart rate by pressing the SEL/ESC
button, the heart rate limits can be edited.
The base level indicates your average light
moving heart rate limit and the maximum
heart rate is what you can reach under
extreme exercise. Select the values with +/
UP or -/DOWN and conrm with the SEL/
ESC button.
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3.1.1.1 Workload
At the base of any decompression
calculation there is the transport of nitrogen
from the lungs to the blood and from there
to the tissues during on-gassing, and the
same but in reverse during off-gassing.
As such, it is obvious that the single most
important parameter in a decompression
calculation is the rate at which blood
travels through the body. During heavy
exercise, the total blood ow from the heart
can be up to 4 times higher than while at
rest. This increase in blood ow is rather
unevenly distributed, with some tissues
such as the Central Nervous System and
the brain being unaffected, while others like
the muscles receiving up to 10 times more
blood than when at rest.
The A2 estimates workload based on heart
rate or changes in breathing pattern from
the high-pressure transmitter, and the
decompression calculation in the ZH-L16
SCUBAPRO recommends using the
workload and Heart Rate features on all
dives, but especially when making technical
dives. When the dive goes as planned
there is no effect to the decompression
schedule. However, when workload is
high more decompression time will be
required. Adaptive algorithm additionally
incorporates into the calculation the water
or skin temperature (only with the patented
SCUBAPRO Heart Rate belt) and micro
bubble formation.
A2 USER MANUAL
3.1.1.3 Contrast
In the User submenu toggle down to
Contrast and press SEL/ESC to access
the display contrast settings. Contrast can
be set from 0 up to 15 using +/UP or -/
DOWN and saved with another press of the
SEL/ESC button.
English
You can also select the workload to be
measured from breathing by selecting the
“respiratory” or a combination of heartrate
and breathing where both parameters
are measured and the higher or lower
parameter is used by the algorithm.
When heartrate is not selected as a
workload parameter, the heart rate monitor
can be still shown in the screen during
diving. This can be selected at the lower
eld where HR can be selected to be ON or
OFF. Conrm the selection by pressing the
SEL/ESC button.
3.1.1.2 Backlight
In the User submenu press SEL/ESC to
access the backlight settings. The duration
of the backlight can be set from 5 up to 30
seconds using +/UP or -/DOWN buttons
and saved with another press of the SEL/
ESC button.
3.1.1.4 Units
Different combinations of temperature, air
pressure and height or depth measurement
units can be selected in the Units submenu.
NOTE: Setting units can be completed
F
directly in your A2’s Units submenu
or on your PC/MAC and personal
hand held device using the program
LogTRAK. For further guidance on
how to set units with LogTRAK, please
refer to chapter 5.2.5 Setting units in
LogTRAK.
A2 USER MANUAL
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